Piston-ring



H. R. SEIFER'T.

PISTON RING.

APPLICATION FILED MAY 2. 1917.

1,369,362, Patented Feb. 2 2, 1921.

HE Se lye/'2 HENRY RICHARD SEIFERT, OF ELLSWORTH, WISCONSIN.

PISTON-RING.

Specification of Letters Patent.

Application filed May 2, 1917. Serial No. 165,933.

T 0 all whom it may concern:

Be it known that I, HENRY RICHARD. Snirnn'r, a citizen of the UnitedStates, residln at Ellsworth, in the county of Pierce an State of.Wisconsin, have invented certam new and useful Improvements in Piston-Rings; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertalnsto make and use the same.

This invention relates to improvements in piston rings, particularlydesigned for use in connection with internal combustlon engines, and theinvention has for its primary object to provide an improved terminalconnection between the ends of a split ring to insure against leakage ofthe fluid past the 'oint.

1 With this and other objects in view, the

invention consists in the novel construction,

combination and arrangement of parts as will be hereinafter specificallydescribed,

claimed and illustrated in the accompanying drawing, in which:

Figure 1 represents a plan view of the im-' proved piston ring,

Fig. 2 represents a fragmentary perspective view of the joint betweenthe terminals of the ring,

Fig. 3 represents a transverse sectional view on the line 33 of Fig. 2,

Fig. 4 re resents a transverse sectional view on the ine 4-4 of Fig. 2,and

Fig. 5 re resents a fragmentaryp'erspec' tive view 0 one terminal of thering.

Referring to the drawing in detail, Wherein similar reference numeralsdesignate corresponding parts throughout the several views, the numeral5 indicates the body of the ring which is rectangular in cross section,as usual, and is split to provide overlapping terminals 6. As in theordinary types of piston rings, the inherent resiliency of the-materialfrom which the ring is constructed normally maintains the ring inexpanded condition and it is designed to be contracted when placed inthe groove of the piston (not shown) so as to snugl fit against theinner-surface of the wall 0 th cylinder.

v Each of the overla pedends 6 is reduced to provide a tongue i and theinner, or adlimit the contracting movement of the ring.

Patented Feb. 22, 1921..

The opposed'side faces of the ring are formed with recesses 10 ofconcave formatron to receive and provide sockets for the tongues 8,which are slidably received in recesses 10.

When the ring is applied to a piston and positioned in the cylinder ofan engine, it expands against the inner surface of the wall of thecylinder and engages the walls of the groove in the piston, so as toprevent leakage of the fluid between the cylinder Wall and piston. Thetongues 7, fitting in the recesses 10, provide a seal to prevent fluidfrom leaking throughthe joint between the'terminals of the ring and thepressure from the top or bottom of the piston directed against thetongue 7 which is presented to the pressure, causes said tongue to befirmly pressed into the recess 10 to increase the security of the seal.

The interlocking tongues and grooves are segmental in cross section andare therefore devoid of square corners which form pockets in whichcarbon lodges. In preventing the deposit of carbon the tongues fitflatly in the grooves which disposes the outer sides of the end portionsof the rings flush and thereby prevents scoring of the cylinders.

What I claim is:

A piston ring comprising a body consisting of a strip of material'ofuniform transverse breadth throughout its length, said strip havingoverlapping end portions each- In testimony Whereof'I afiix mysignaturein presence of two witnesses.

HENRY RICHARD SEIFERT.

Witnesses: JJ'B. MORELY, A. J. BAKER.

